Rotary hoe



Nov. 23, 1943.

- C. T. RASMUSSEN FAL ROTARY HOE Filed March 6, 1942 2 Sheets-Sheet l ww n@ one c. T. RAsMUssEN rs1-AL 2,334,842

Nov. 23, 1943.

ROTARY HOE Filed March 6, 1942 2 Sheets-Sheet 2 ORN YS 'defined by thelflingfed"connection.` f

VferfedA construction has been illustrated.

- ewa o The present invention relatezslge'nfifalllv cultural Iachinesandnioe ticularly ttl ge impiemntsumwnieh two or reg ing units are connectedftogth r i Y lation. More 11:5articuifarl;'74,`V` theyprjesen' izlven ion f relates `to certain improvements in'rrot an implementin whichf interconnected toothed ground engagingwheels p' along the groundy to breakupfthe SoilY cr' the soil adjacent cron `plants and,L destroy; eeds and' other objectionable plants ju'stv s'tkart'ig'a to take root. Y f Y The object and genral nature'ofv the .ii'sh'lt invention isAv the provision .of a rotaryv hoe that is made up' of two or' more substantiallyl identical Vunits or sections that .are flexibly' connet'dftoi g'ether and are*A free to iove Yup" and dow'gf one with respect to the other, btj'are restrained against relative movement in`V a gnerally'hi zontal plat-*le More particular1y, .itil is -afatire of thsinventonnto provide connections bt'wn adjacent sections' i'n thenatuie of hinges Whr'e'r'-, by the sections are vrigid, with respe'zt to e'ach other in all directi'onsexc'ept about the one aX'is Another importantr feature 'ofl the 'present invention is the provision of a new type offrame whichA is Y particularly constructed sov as to fifide more clearance notV only over the hoe wheels'ibiit y a also between the front and rear end hoe Wheels, 3b where Vin conventional rotary hoes"clea1"ar`1ce=is obj ectionaloly4 small. Specifically, it is a feature of this invention to provide an in'lpr'ovedA rotary'he frame in which the need for tie bars betweenl the 'front andrearaxles of the-'hoe Wheel gangsis if eliminated, thus providing maximum clearance between the hoe wheels, partcularlyiatithe erids. These and-other objects and 'advantages-ofthe presentinvention wilLbeapparent toithoseiskilled intlneart4 afterza' consideration oftheiollowing L46 the aempaayiag drawings, in nemiche pre,-

In the drawings: v Y

Figr 1`A is a plan View" ofaJT four-f6 drawn rotary l'o'in the p rotary hoe shown in Figure 1; and

t F'gurefS'is' anferidvi'ewoftlie section'shw'r in ctorj '45 tiaily identifier rotary he Se'etiolns"1;l

y nel ls'fed le; resiiee'tively?V prefieren@ trie? arch is indicatedy bythe reference-numeral 2e. Bolts longitudinal frame members 8. vFigure 2, the front and rear cross bars 35 and 29 secure the two bearing parts of each bearing about the associated hoe Wheel shaft 5. The frame 2 also includes front and rear cross bars 35 and 36, each being secured, as by a bolt 31, to the downturnedfront and rear ends of the As best shown in 36 extend laterally :outwardly beyond Athe ends 'of the longitudinal members.Vr A'brace 4i, sub'- the longitudinal barst) in offset relation in order stantially L-shaped, is connected between each of each frontA brace is secured to the front cross b ar ldoin-spaced relation', with spaoersltjdisposed therebetween, The rear br aces lli.j als o` have. .laterally Aoutturnecl ends G3 which: areise:

-cured,1asiby bolts 46a, to the ends of the'rear' crossgbar 35, with spacers 46a therebetween.

. Theseveralsrotary hoe sections l are hingedly vmun ectecltfieetherbv pivot means that'resteins .l 'Y anymovementof onesection relative to theother eXc,ept movement aboutsagenerally fore and aft 'axisj .deined` by the;` hinged connecting, means.

' .most` end portions of the cross bars Vand 36 Y andthe :associated laterally outwardly directed vportion'sli-l of the braces 4 1 areapertured, to re,- ceiveL pivot bolts 5|, and the rotary hoe sections areassembledwththe ends of thebraces M 'and bars 35, 36in overlapping relatiorrthe laterally .outwardly directed portions of the brace members and cross barsat the frontportions ortheadjacent rotary hoe sections; being indicated bythe reference numerals 35h, 35e and 43o,- Sc, respectively... :At the normallyront side of the-.rotary .h Qe, each 0f Y thev pivot .bolts carries a li-shaped `member 55 wh ichisjrapertured to receive Va pin A56. held inthe member 55 by any suitableirneans.

The connectionbetween the -rotaryihoesetions Y v at the normallyfrear side ofA the implement is substantially the same as that-justdescribe-d, the n b r ear pivot bolts 5i Y. receiving rear members-- 55a @which areapertured -to receive the pins .56..unde'r certainconditions as described below. From-the abQve description it will be seen, therefore, that each framev {includes-laterally outwardly; dif

' rected. extensions,.disposed beyond the ends yof the arclrmembers i3 and I4,f by which each v rotary'h section may beihingedly connectedto thelateral extensionsof the adjacent rotaryzhoe section, thereby Vproviding for upward and idown; ward swinging ofeach-section relative'gto ithe adjacent sections but restraining allrelative to dispose `the wheels of one hoe wheel unit in between the wheels of the other unit, which is the desired relation. The frame structure 2 of thev present invention thereforel permits the use I v .of identicalfront and rearhoe wheelv gangs for mounting them in such a manner that the wheels are disposed in the overlapping relation desired. Asv bestfshown in Figure 3, the Vrearends of the forward braces "il terminate'at the front bearings v 26 while the forward' ends of the rear braces 4I .1 terminate atV the rear bearingsj, Vthus leaving fj;

an `open space S between the arch members I3 and i4 and underneath the longitudinal barst,

5 Sincey thelatter are arch members they pass over 'the associated hoe wheels with ample clearance, and since'the braces are not continuous betweenl the frontend rear-'cross bars 35 and .16; there is no restriction, as in prior rotary hoes, between j the end wheels, as would occur if single brace bars were .provided and extendedA from front to` rearv in betweenlthe end Wheels, Therefore, ace u' iording .tothe principles of thepresent invention, there is as much clearance between wheels as any of the other hoe wheels.

1n operation, sincethe sections are connectedv together for relative Ymor/ernennt about a'single hingeaxis,V the sections are free toswing'up and down r relative Lto one anotherwhen rough or ir-y gregular conditions areencountered in the Vfield, yetwthe several sections are fdrmlyy and positively held in transverse alignment, vmaking itfunnecese sary to have an evener bar/ or other complicated Y l h itch arrangements. Instead, la; simple able hitch maybe used. A particular frame construe-f tionprovides ample Vclearanceat theends of the sectionsfyet the hoewheels atr the ends of the sections are `as f close together asV the wheels, in

theintermediate portions of the sections. Hence,

there is no skipping between sectionsand the implement, although relativelywide, cultivate's and mulches the soil for the f ull width of the entire implement, due to Athe particular frame construc-V tion that permits bringing Vthe end wheels of one Y section close tothe end wheelsofthe adjacent section but withoutinterfering with the clearancelbetween the wheels. Y

While there has been shown andk described 4above the preferred structure in which the prin-z ciplesof the present invention have been incorporated, it is to be, understood that Ythe ypresent 'invention vis not .to belimitedto .the particular ated' pins 56, and the V,forward endsofthe several V cables areconnected .by afclevis-l; to a. .tractor Qrother sourceof power, represented-3h52; the

drawbarEB.

best shownv in am the' message' 'als Y @1106 Wheels @rearranged with theinheels AY0f onevunit in `staggered. or overlapping lrelation with respectto the adjacent ,portions of the wheels ofthe other unit, ftl`1`e axleshafts'beingsup ported in 'the bearingsV '26' 1at" 'the lower nd'sf of theVY transverse arch members |13' and 114. 'Ifhe latter' members, as rmentioned above, are'inedto Hsaid'units u. v

' 2. Ina rotary hoe,' a rotaryuhoe section com J prising a frame including .apair of generally Y :details shown and described above, but/that, in

actg-,Wldely differentrneans maybe employed in Athe practice of the broader aspects of athisinven{ 51.. In a rotaryv hoe, a frame"includingrigidly V` interconnected front and. rearA arch'membersfdis-f .posed transverse Vwith the "end portions thereof disposed downwardly, and apairofhoef'whe'e1 unitsfrjournaled directly fon'the lower endpo'rf|` f tions of said arch members," the space between the .i downwardly disposed end portionsiatea'ch side Aof lthe'hoebeing open andsaid downwardly 'disn portions constituting' thejfprincipal v posed fend stress-bearing members transmitting draft A to longitudinally extending members,l a Ipairxof transverse archmembers' fixed in Yforeavndv aft 'spaced' relation' to said longitudinal members, ja a pair of hoewheel units, said arch membersbei; n

the end hoe 'f l ing' disposed" respectively 1 in vthe vertical. transverse pianesl'of said hoewh'eelunits, meansjournaling tneferwa'rd unit directly to `the :downtur'ned end'szef the forward arch member, means @journaling the rear nce unitonthe'downturned 'lends' i'iftlieV rear arch bar, andlmeajns-eonrieoting *the dcwiitiirned ends of nieirrorit and research members tothe frontand Vrear ends, respectively, of said'longtudihal mer'nbers."4 a i y In a rotary hoe, fa `ro-tary hoe section `comprising afra'n'ie including a pair of transversely 4"disposed fore and aft spaced archmembersarranged i'nofislet relation, and a pair of lice wheel seetionsjoinnaled c'l'irect-lyfonl the Vdownturri'ed Y'ends ofsaid transverse arch-members, said 'offsets providing for the 'disposition offfthe hoewheels (nf-one section in: between the hoe wheels vv'of the "other section; e y 1 '4.1m arotary hoe, Ya rotary holefsection coinprising a pair of longitudinally extending Varch ,members 'a pairv of `transverse "longitudinally spaced apart arch members, means rigidly fixing said arch members together; a] transverse bar connected to the downturned forward ends fof said longitudinally extending rch members, -a second transverse bar fixed tothe downturned rear ends of said longitudinally extending varch members, link 'members extending from thedownturned ends ofthe forward transverse'arch member to the forward bar`,1andflinl`rs extending rearfasc-asse thereon, Asaid rotary nce `units beingarran'g'ed withtn'efhoewneels of 'one' 'unitdispcsed inbe- Vinicienfthe adjacentpcrtionsfof the wheels lofthe wardly frrn'the "down'tur'ned ends of said rear arch bar to said rear transverse bar, there being an open hoe wheel receiving vspace between the downturned ends of said front and rear transverse arch bars.

5. In a rotary hoe, avrotary hoe section com- Y prising a pair of rotary hoe wheel units, each including a shaft andv a` plurality `of relatively closely spaced hoe wheels, a frame comprising aV pair of longitudinally extending ibars and a pairv of longitudinally spaced apart transversely 'e'xtending arch members, each having downturned ends, and means fixingl said arch members to said longitudinally extending members in laterally offset relation, andA journal means at the Y lower ends of said arch members to receive the shafts of said hoe wheel units, the amount of off- Y set and the space longitudinally between `said arch members being such that the hoe wheels on one shaft are disposed between the hoe wheels on the other shaft.

6. n a rotary hoe, a rotary hoe section coniprising a frame including longitudinal members, a cross bar fixed to the front and rear ends of said longitudinal members, anda pair of arch bars fixed rigidly to said longitudinal members, a pair of rotary hoe units, each including a shaft and a plurality of rotary hoes thereon, journal means on the lower ends of both of said transverse arch members for receiving the shaft of the associated rotary hoe unit so that the downother framemeans "including "a paircf l transverse 'arch bars, one for'each'of said units, "ea'clfil arch bar having its lower fendinfVY journaled i connection with the associated rotary hoe unit,

between the two end wheels thereonsaidframe generally-'in the planeof .said hoefwheel shafts,

"of, each off-saidV arch members, said barexon spaced frombut lying in the vertic'alilongithe adjacent overlapping-hoe wheels. l -v 8. In a rotaryihoe, ya rotary 4hoe sectioncon prising frame' means `including 4longitudinally ex- 'tending frame mein-bers, transversemembersffat theforward and rearends of said'lcngitudinal members, and -a'rch members 'disposed transversely-and fixed-to said longitudinal members `in l fore land-aft spaced relation, a pair of rotary hoeV` wheel units journaled'for lro-'tatloncntlie lower n downturned 'ends of said arch members, respectively, said rotary hoe `wheel units being disposed with the hoe wheels thereofin overlapping Jrelation, said arch members being oiset in a transverse direction, one with respect to the other, so

yas to dispose the wheels of one hoe wheel unit in vbetween the l,adjacent portions ofthe Wheels of thefother hoewheel unit, and two pairs of brace 1members,onevpair for each of s aid arch members, each of said brace members being fixed to the downturned end of the associated arch mem-` ber and extending therefrom toward the adjacent end ofthe associated transverse frame member, said bracermember having a portion extending along the associated transverse member, and VSaid v,portions of said transverse Vmembers and said brace members extending transversely beyond the hoe wheel units so as to provide for the connection of, two or more rotary hoe sections l together in generally transverse alignment.

turned ends of said transverse arch `members exc tend between the two end "hoe wheels at each end of each shaft, a pair of front braces connected at their rear ends to the downturned ends of the front arch member and at their forward ends to the laterally outer ends of said `front transverse bar, anda pairof rear braces connected at their forward ends toV the downturned ends ofthe rear transverse arch member and at their rear ends to the rear transverse bar.

'7. In a rotary hoe, a rotary hoe section com- 9. The invention set forth in claim 8, further characterized `by Vthe provision of a plurality of such rotary hoe sections with the laterally extending portions at one side of each rotary hoe section overlapping the adjacent and similar portions of the adjacent rotary hoe section, and

pivot means passing through said overlapping portions of Vadjacent sections whereby the latter arel connected together for vertical hinging move- Y ment but are restrained thereby against relative movement in any other direction. t

10. A rotary hoe comprising a plurality of at least two rotary hoe sections, each section including rotary hoe wheel units and a frame in which the unitsare journaled for rotation, said frame Y having lateral extensions atV each side thereof extending beyond said hoe wheel units; the latf eral extensions of one section overlapping the lateral extensions of adjacent sections, and pivot means connecting said overlapping lateral extensions, each of said pivots having cable receiving means.

11. Arframe for a rotary hoe or the liliejcomprising a pair of generally longitudinally extendprising a pair of rotary hoe'units, each consisting of a shaft and a plurality of hoe wheels mounted ing frame members having downturned portions at their ends, fore and aft spaced members includng downwardly extending portions fixed to ffsaidf. longitudinalV members. between( their ends,

:fand-generally fore and aft extending brace means .extending .from the downturnedend 'portions of said-.longitudinaL members inwardly; toward .and fixed .-to1 said downwardly extending sections of l-theiffore, and aft spacedgmemb'ers, there. ,being an openi `unobstructed .space .betweenv said; down- 1 :wardlyzextending sections. f

12.1` Inv ar rotary hoe, 5a; rotanfhoev`v section comprising. aframe .including rigidlyv interconnected .front and reararch members disposed transverse .with vthe endportions thereof 4disposed Vdown- `pwardlygcross; bars disposed inthe plane of and spaced fore and .aft from the downwardlyV dis- `posed; endsV of said arch members, brace meansconnectedpat. its"A rear VVends to the downwardly rdisposediends of the forward -archmember and n E at'its. forward ends to .the forwardv cross bar,fa nd f brace .meansoonneoted at its forward-ends to the downwardly disposed ends of the rear arch mem- .-7

f ber and at its rear' ends to the Vrear cross bar.V 13.= In arotaryhoe, a frame comprisinga pair .ofi rigid longitudinal stress-bearing members,

' .spaced apart laterally, apair of rigidstress-bearinglongitudinally spaced transverse arch `mem..

l bers and means rigidly securing the intermediateY l portions of saidY arch members to said longitudinal members `with the end portions of said arch members disposed downwardly and with .an open space between the generally Vertical planes of Y-said end portions .below saidlongitudinal members, andi rotary hoe' units connecteddircctlytd the'end portions. of said archlmembers and'. disposed insaid open space ofvsaid frame.

downwardly, anda pair of identicalhoe `Veach vcomprising a shaft with hoe wheels thereon, journaljeddirectly lontloe lowerendsof the kownA Y .wardly extending end portions of lsaid arch in em-V bers, one end portion of 'one arch member at zone side'of the hoebeing disposed closer to theadcent longitudinal member than' thek distancbe- Y tween the other end portion of said one arch membefand .the other longitudinal meinben andv the end portion oftheo'ther rarch member atithe' i 'other side of the'hoe being disposed closer to s'ald other longitudinal member than the.distance'be-V I j tween the end portion of said other arch member at'said one sideof the hoe and the adjacent longitudinal member, whereby the Vhoe wheelsof 'one of' said identical units are. disposed in'stag'-v I gered relation with respect to the hoe wheelsof f l th'e'other unit.

'CLARENCE T. RASMUSSEN. I `ARTHUR J. BJERKANJ. 

